Cornelius birkery and george r



(No Model.)

0. BIRKERY & G. R. CASE.

VACUUM APPARATUS.

No. 442,474. v Patented Dec. 9, 1890;

fim fi e I I? d 9 Z AIII IAIIIIA 9 TTn STATES PATENT OFFICE.

CORNELIUS BIRKERY AND GEORGE R. CASE, OF HARTFORD, CONNECTICUT; SAID BIRKERY ASSIGNOR TO FREDERIC M. PECK, OF SAME PLACE.

VACUUM APPARATUS.

SPECIFICATION forming part of Letters Patent No. 442,474, dated December 9, 1890.

Application filed August 23, 1890. Serial No. 362,904. (No model.)

To coll whom it may concern.-

Be it known that we, CORNELIUS BIRKERY and GEORGE R. CASE, citizens of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Vacuum Apparatus, of which the following is a full, clear, and exact specification.

The invention relates to the class of apparatus which utilize the flow of fluid for abstracting gases from a vessel to form a par tial or complete vacuum; and the object is to construct a simple and cheap apparatus of this class which can be quickly adjusted to produce with an economic supply of fluid a more complete vacuum in a vessel or battery of vessels in less time than prior vacuum apparatus.

Referring to the accompanying drawings, Figure 1 is a side elevation of the apparatus. Fig. 2 is a vertical' section. Fig. 3 is a horizontal section.

In the views, the letter a indicates a tube of some non-oxidizable or non-corrosive material open at one end and at the other connected with a reservoir 1), containing a fluid, as mercury,water, oil, carbonic-acid gas, or air under a suitable head, which is obtained by elevation, a pump, or a compressor. A stopcock 0 is located in the connection from the tube to the reservoir to control the flow of fluid. The tube (1, which is located adjacent to and parallel with the tube a, is closed at one end by a plug 6, that is shown as screwed into the end of the tube, having a narrow slot f,which forms the outlet from the tube, while the opposite end is connected with a chamber or with a tube to which is connected a series of vessels-as incandescent lamp globes from which all gas is to be exhausted. Upon the ends of the tube a flanged plate or cap 9 is fitted so as to have some movement toward and from the slot f and the fluid-passage a. The movement of the plate may be controlled by means of a screw 7t, which passes through a table or timber which supports the apparatus, so that the inner face of the plate,wl1ich is preferably hollowed out or formed on an incline, may be broughtquite close to the ends of the tube, so that the fluid as it emerges from the tube (L is diverted. and thrown up ward, so as to strike and impinge against the face of the plug 6, just outside of the outletslot f, and form a vacuum over the outlet, which rarefies the gas in the tube (Z and the vessels with which it is connected. An outlet-slit '21 is cut in one side of the flange above the plate to allow the fluid to escape freely.

The fluid utilized to produce the rarefaction is permitted to escapeirom the reservoir through the tube a, and when it strikes the inclined deflecting-face of the plate g it is thrown upward against the face of the plug 6, just beyond the slot f, and there causes a suction or produces an initial vacuum,which withdraws all gas from the tube (1 and the vessels with which it is connected. The plate 9 is readily adjusted toward orfrom the ends of the tubes, according to the density of the fluid, so that as the fluid is turned up it will strike and pinch between the plates just beyond the slot f, in order that a minimum quantity of fluid may be used to produce the best result.

The device is simple, cheap in construction, quickly adjustable for the use of fluids of varying density, and is very eflicient.

e claim as our invention- 1. In an air-pun1p having a passage connected with the vessel to be exhausted, said passage having a narrowed outlet, a fluidpassage and a plate located a slight distance in front of the outlet and fluid-passage adapted to be moved to or from said outlet and fluidpassage to divert the fluid and throw it over the narrow outlet as it emerges from the fluidpassage, substantially as specified.

2. An air-pump having a passage connected with the vessel to be exhausted, said passage having a narrowed outlet, afluid-passage and an adjustable plate located in front of the outlet and fluid-passage, the face of which is nearer to the outlet than the fluid-passage to divert the fluid and throw it over the narrow outlet as it emerges from the fluid-passage, substantially as specified.

CORNELIUS BIRKERY. GEORGE R. CASE.

"Witnesses:

HARRY R. WILLL-uus, 1 M. PEC'K. 

